20201320313231 has 4 divisors (see below), whose sum is σ = 20694035442864. Its totient is φ = 19708605183600.

The previous prime is 20201320313077. The next prime is 20201320313261. The reversal of 20201320313231 is 13231302310202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20201320313231 is a prime.

It is a super-2 number, since 2×20201320313231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201320313197 and 20201320313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201320313261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246357564755 + ... + 246357564836.

It is an arithmetic number, because the mean of its divisors is an integer number (5173508860716).

Almost surely, 2^{20201320313231} is an apocalyptic number.

20201320313231 is a deficient number, since it is larger than the sum of its proper divisors (492715129633).

20201320313231 is an equidigital number, since it uses as much as digits as its factorization.

20201320313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492715129632.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20201320313231 its reverse (13231302310202), we get a palindrome (33432622623433).

The spelling of 20201320313231 in words is "twenty trillion, two hundred one billion, three hundred twenty million, three hundred thirteen thousand, two hundred thirty-one".